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Q:

Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)

A) 61, 58 and 55	B) 54, 51, and 48
C) 55, 58, and 61	D) 48, 51 and 54

Answer & Explanation Answer: A) 61, 58 and 55

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

Q:

A truck covers a distance of 550 metres in one minute where as a bus covers a distance of 33 km in 3/4 hours. Then the ratio of their speeds is :

A) 1:3	B) 2:3
C) 3:4	D) 1:4

Answer & Explanation Answer: C) 3:4

Explanation:

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

Q:

With regard to water transportation in India, which of the following statements are correct?

1.Headquarters of Central Inland Water Transport Corporation is located at Delhi.

2.Headquarters of Inland Waterways Authority of India is located at Noida.

3.National Inland Navigation Institute is located at Kolkata.

4.First National Inland Waterway was between Haldia and Allahabad.

Select the correct answer using the code given below.

A) 1 and 2 only	B) 2 and 3
C) 2 and 4 only	D) 1, 2and 4

Answer & Explanation Answer: C) 2 and 4 only

Explanation:

Central Inland Water Transport Corporation - Kolkata

Inland Waterways Authority of India - Noida

National Inland Navigation Institute - Patna

First National Inland Waterway - Between Haldia and Allahabad

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Filed Under: Indian Geography
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Q:

The radius of base of a right circular cone is 6cm and its slant height is 10cm. Then its volume is

$(u s e π = \frac{22}{7})$

A) 301.71 cm3	B) 310.71 cm3
C) 301.17 cm3	D) 310.17 cm3

Answer & Explanation Answer: A) 301.71 cm3

Explanation:

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Filed Under: Simplification
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Q:

If a.sin 45°.cos 45°.tan60° = tan 245° cos60° then find the value of a ?

A) 13	B) 3
C) 1	D) 32

Answer & Explanation Answer: A) 13

Explanation:

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Filed Under: Simplification
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Q:

If $x + \frac{1}{x} = - 2,$ then the value of $x^{7} + \frac{1}{x^{7}}$

A) 1	B) -1
C) 0	D) -2

Answer & Explanation Answer: D) -2

Explanation:

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Filed Under: Square Roots and Cube Roots
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Q:

Biological catalysts are protein molecules which

1. speed up a chemical reaction

2. remain unchanged after reaction

3. function optimally at 37 deg C.

4. do not have an enzymatic activity

Select the correct answer using the code given below.

A) 1 only	B) 1, 2 and 3
C) 2 and 3 only	D) 1, 3 and 4

Answer & Explanation Answer: B) 1, 2 and 3

Explanation:

Enzymes are biological catalysts. Enzymes are the catalysts involved in biological chemical reactions.

A fundamental task of proteins is to act as enzymes—catalysts that increase the rate of virtually all the chemical reactions within cells.

A catalyst remains chemically unchanged itself at the end of a reaction.

Each enzyme has a temperature that it works optimally in, which in humans is around 98.6 degrees Fahrenheit, 37 degrees Celsius –the normal body temperature for humans.

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Filed Under: Biology
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Q:

Which of the following cells do not contain nucleus?

1. Root hair cells

2. Red blood cells

3. Platelets

4. Monocytes

Select the correct answer using the code given below.

A) 1 only	B) 2 and 3 only
C) 1, 2 and 4	D) 2, 3 and 4

Answer & Explanation Answer: B) 2 and 3 only

Explanation:

The absence of a nucleus is an adaptation of the red blood cell for its role. It allows the red bloodcell to contain more haemoglobin and, therefore, carry more oxygen moleculesLike red cells, platelets (thrombocytes) have no nucleus.Monocytes have a small spherical nucleus and has abundant dark staining condensed chromatin.There are 5 organelles found in a root hair cell. They are the: nucleus, cytoplasm, cell membrane, cell wall and vacuole.

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Filed Under: Biology
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